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Related Experiment Videos

VDD pacing with a previously implanted single lead system.

Y Nakata1, S Ogura, T Tokano

  • 1Department of Cardiology, Juntendo University, School of Medicine, Tokyo, Japan.

Pacing and Clinical Electrophysiology : PACE
|October 1, 1992
PubMed
Summary
This summary is machine-generated.

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Pacemaker replacement using existing leads is feasible. DDD pulse generators can successfully replace older RS4 models, ensuring continued VDD pacing without lead replacement, maintaining effective atrial sensing.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Device Technology

Background:

  • Rate modulated, atrial sensitive RS4 pacemakers with single orthogonal leads were implanted.
  • Depleted RS4 pulse generators necessitate replacement strategies.
  • The RS4 pulse generator is no longer commercially available.

Purpose of the Study:

  • To evaluate the feasibility of replacing depleted RS4 pacemakers with DDD pulse generators.
  • To assess the efficacy of reusing existing single orthogonal leads with an adapter.
  • To determine if atrial sensing is maintained after lead repurposing.

Main Methods:

  • Three patients with RS4 pacemakers underwent pulse generator replacement with DDD devices.
  • Original single orthogonal leads were reused with an adapter for bipolar to unipolar atrial configuration conversion.

Related Experiment Videos

  • Holter monitoring was performed to assess atrial sensing.

    • Main Results:

    • The mean atrial electrogram amplitude was 1.8 mV.
    • No significant atrial sensing defects were identified during Holter monitoring.
    • Successful VDD pacing was continued using the repurposed lead system.

    Conclusions:

    • Replacement of depleted RS4 pacemakers with DDD pulse generators is a viable option.
    • Repurposing existing single orthogonal leads with an adapter is effective for continued VDD pacing.
    • This approach maintains adequate atrial sensing, offering a practical solution when older devices are obsolete.